Using Semi-Transparent sprites with alpha channel

[therealmethuselah]

Download: alphaTutorial.gm6 (19.0KB)

This requires a program that can do alpha, layers, drop-shadows etc (I used Photoshop)

I started with a .png image that had a semi-transparent drop shadow.


I loaded it into photoshop and added a background layer which I made black.


I then saved this as sprite1.gif

Now I do a color overlay on the layer that has the helmet on it with White.


I then save this as sprite0.gif

I then load these into GameMaker as sprite0 and sprite1

I then create an object called object0 and a room called room0

I set object0's sprite to sprite1.


In the creation event of object0, I place this code.
sprite_set_alpha_from_sprite(sprite1, sprite0);

I add this object to the room.

And voila! Semi-Transparency (like. png)!